Grease-cup.



0.11. TERRY. GREASE 0UP. APPLICATION FILED NOV. 1, 1907.

Patented Apr. 11, 1911.

WITNESSES:

I INVENTI'H Add, M W mla A TTORNL" Y UNITED STATEIEFENT OFFICE.

OTIS N. TERRY, OF LINCOLN, NEBRASKA, AS SIGNOR F ONE-HALF TO ROBERT 1). SMITH, OF BOSTON, MASSACHUSETTS.

GREASE-CUP.

To all whom. it may conccnw- Be it known that I, OTIS N. TERRY, a c1 t1-' zen of the United States, residing at Lm- The object of my invention is to prevent y the loss of grease plugs from the cups used upon locomotive engines, and especially upon the connecting rods and parallel rods 7 thereof.

In the drawingsFigure l is a plan view showing one form of a grease c'up'constructsection. Fig. 4 is a side view of the ed according to my invention. Fig. 2is a plan view of the plug detached from the cup. Fig. 3 is an elevation view partly in P showing the locking groove therem. It has been the custom heretofore to secure grease plugs in position by means of jam nuts, but the working loose of the jam nuts has permitted the plugs to work out' of the bushings in which they are'threaded, thus leading to frequent loss. The object of myinvention isto obviate this difiiculty.

The body 1 of the grease cupisin the pres- 'ent instance formed integral with thecon- I necting rod, or other part, to which it is applied. Screw threaded into the cup 1 is a bushing 2, and threaded into the interior of the bushing 2 is the grease lug 3, provided at its top with a rectangu ar socket 4, or

other means, whereby it may be rotated.

The bushing 2 is permanently 'fitted to the body of the grease cup 1 by means of the screw threads illustrated, and is provided 'forfthe purpose of avoiding wear upon screw threads forming part of the main body of the 'rea'se'cup. My invention, however, is equa ly, applicable whether or not such bushing be employed. The grease plug 3 is provided with a groove 5 extending from the top thereof to a'point near the bottom, the lower part of the plug having an uninterrupted screw threaded surface. The length of the bushing 2 and of the groove 5 are sov proportioned that the lower end of the groove5 will not extend below the lower end of the bushing when the plug is in its innermost position, the parts being propor vtioned in this manner for the purposeof preventing escape of grease through the groove.

Secured to the top of the bushing 2 byrlvets 6, or other suitable means, 18 a spring Specification oi Letters Patent.

Application filed November}, 1907. Serial No. 400,150.

Patented Apr. 11, 1911.

ence .of the plug The tension of the spring normally holds the tooth 8 in the groove 5. One face of the groove 5 and the co-acting face of thetoothB are preferably inclined in' order to permit the inward rotation of the plug. The opposite faces of the groove and tooth are straight and lie in such a plane as to prevent the rotation of the plug in the opposite or outward direction. In order to facilitate the removal of the plug I provide a stud 9 projectin from the upper surface of the bushing 2 a jacent the free end of the spring 7. This stud is preferably beveled upon its inner surface as shown at .10--in order to permit the spring 7 to slide freely thereover when thrust outwardly. The outer face of the stud 9 is perpendicular tothe upper surface of the-bushing 2 and serves to hold the tooth 8 of the spring out of engagement with the notch 5 when the spring is moved to its outer position. When it is desired to,move the plug 3 outwardly the spring 7 may be lifted over the stud 9, in

which position it will remain with the tooth While I have described a form of grease cup embodying my invention, it is apparent that the mventlon may be applied in other specific forms and is not restricted to the particular mechanisms herein illustrated.

What I claim is- 1. A grease cup, a notched plug screw threaded therein. a spring secured at one end to said grease cup and having a part normally engaging the notch in said plug. and a stud upon said cup in proximity to the free end of said spring.

2. A grease cup. a notched plug screwthreaded thergin, a spring secured at one end to said grease cup and having a part norn|all engaging the notch in said plug, and a stud upon said cup in proximity to the free end of said spring, said stud having a beveled surface adjacent to said. spring whereby said spring may be easily moved over said stud out of engagement with said notched plug. I

3. A grease cup, a bushing screw threaded therein, a plug screw threaded in said bushing, said plug being provided with a groove extending endwise of its threaded surface, a spring'detent adapted to engage-said groove, the proportions of the parts being such that when the plug is inits innermost position'\ the inner end of the groove therein will be '10 Witnesses K. E. Cnmsnn'rsom. RUBY FITZGERALD. 

